<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<meta name="theme-color" content="#222"><meta name="generator" content="Hexo 7.3.0">

  <link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png">
  <link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32.ico">
  <link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16.ico">
  <link rel="mask-icon" href="/images/logo.svg" color="#222">

<link rel="stylesheet" href="/css/main.css">



<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css" integrity="sha256-wiz7ZSCn/btzhjKDQBms9Hx4sSeUYsDrTLg7roPstac=" crossorigin="anonymous">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.1.1/animate.min.css" integrity="sha256-PR7ttpcvz8qrF57fur/yAx1qXMFJeJFiA6pSzWi0OIE=" crossorigin="anonymous">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/fancyapps-ui/5.0.28/fancybox/fancybox.css" integrity="sha256-6cQIC71/iBIYXFK+0RHAvwmjwWzkWd+r7v/BX3/vZDc=" crossorigin="anonymous">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/pace/1.2.4/themes/green/pace-theme-minimal.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/pace/1.2.4/pace.min.js" integrity="sha256-gqd7YTjg/BtfqWSwsJOvndl0Bxc8gFImLEkXQT8+qj0=" crossorigin="anonymous"></script>

<script class="next-config" data-name="main" type="application/json">{"hostname":"sumumm.github.io","root":"/","images":"/images","scheme":"Gemini","darkmode":false,"version":"8.19.2","exturl":false,"sidebar":{"position":"left","display":"post","padding":18,"offset":12},"copycode":{"enable":true,"style":"mac"},"fold":{"enable":true,"height":300},"bookmark":{"enable":false,"color":"#222","save":"auto"},"mediumzoom":false,"lazyload":true,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"stickytabs":false,"motion":{"enable":true,"async":true,"transition":{"menu_item":"fadeInDown","post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"i18n":{"placeholder":"搜索...","empty":"没有找到任何搜索结果：${query}","hits_time":"找到 ${hits} 个搜索结果（用时 ${time} 毫秒）","hits":"找到 ${hits} 个搜索结果"},"path":"/search.xml","localsearch":{"enable":true,"trigger":"auto","top_n_per_article":1,"unescape":false,"preload":false}}</script><script src="/js/config.js"></script>

    <meta name="description" content="本文主要ARM汇编基础知识的相关笔记，若笔记中有错误或者不合适的地方，欢迎批评指正😃。">
<meta property="og:type" content="article">
<meta property="og:title" content="LV01-04-ARM汇编-01-ARM汇编基础">
<meta property="og:url" content="https://sumumm.github.io/post/23c67878.html">
<meta property="og:site_name" content="苏木">
<meta property="og:description" content="本文主要ARM汇编基础知识的相关笔记，若笔记中有错误或者不合适的地方，欢迎批评指正😃。">
<meta property="og:locale" content="zh_CN">
<meta property="og:image" content="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230719203508088.png">
<meta property="og:image" content="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721190130743.png">
<meta property="og:image" content="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721190407864.png">
<meta property="og:image" content="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721192654760.png">
<meta property="og:image" content="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721193017078.png">
<meta property="og:image" content="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721202213081.png">
<meta property="article:published_time" content="2023-09-08T11:25:40.000Z">
<meta property="article:modified_time" content="2025-06-13T16:25:57.032Z">
<meta property="article:author" content="苏木">
<meta property="article:tag" content="(ALPHA)LV01-IMX6ULL平台">
<meta name="twitter:card" content="summary">
<meta name="twitter:image" content="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230719203508088.png">


<link rel="canonical" href="https://sumumm.github.io/post/23c67878.html">



<script class="next-config" data-name="page" type="application/json">{"sidebar":"","isHome":false,"isPost":true,"lang":"zh-CN","comments":true,"permalink":"https://sumumm.github.io/post/23c67878.html","path":"post/23c67878.html","title":"LV01-04-ARM汇编-01-ARM汇编基础"}</script>

<script class="next-config" data-name="calendar" type="application/json">""</script>
<title>LV01-04-ARM汇编-01-ARM汇编基础 | 苏木</title>
  








    <script src="/js/browser_tools_disable.js"></script>

  <noscript>
    <link rel="stylesheet" href="/css/noscript.css">
  </noscript>
<!-- hexo injector head_end start --><link rel="stylesheet" href="https://unpkg.com/hexo-next-tags-plus@latest/lib/tag_plus.css" media="defer" onload="this.media='all'"><!-- hexo injector head_end end --></head>

<body itemscope itemtype="http://schema.org/WebPage" class="use-motion">
  <div class="headband"></div>

  <main class="main">
    <div class="column">
      <header class="header" itemscope itemtype="http://schema.org/WPHeader"><div class="site-brand-container">
  <div class="site-nav-toggle">
    <div class="toggle" aria-label="切换导航栏" role="button">
        <span class="toggle-line"></span>
        <span class="toggle-line"></span>
        <span class="toggle-line"></span>
    </div>
  </div>

  <div class="site-meta">

    <a href="/" class="brand" rel="start">
      <i class="logo-line"></i>
      <p class="site-title">苏木</p>
      <i class="logo-line"></i>
    </a>
      <p class="site-subtitle" itemprop="description">我的学习之路</p>
  </div>

  <div class="site-nav-right">
    <div class="toggle popup-trigger" aria-label="搜索" role="button">
        <i class="fa fa-search fa-fw fa-lg"></i>
    </div>
  </div>
</div>



<nav class="site-nav">
  <ul class="main-menu menu"><li class="menu-item menu-item-home"><a href="/" rel="section"><i class="fa fa-home fa-fw"></i>苏木的家</a></li><li class="menu-item menu-item-categories"><a href="/categories/" rel="section"><i class="fa fa-th fa-fw"></i>分类页<span class="badge">42</span></a></li><li class="menu-item menu-item-archives"><a href="/archives/" rel="section"><i class="fa fa-archive fa-fw"></i>归档页<span class="badge">673</span></a></li><li class="menu-item menu-item-flink"><a href="/flink/" rel="section"><i class="fa fa-link fa-fw"></i>友人帐</a></li><li class="menu-item menu-item-about"><a href="/about/" rel="section"><i class="fa fa-user fa-fw"></i>关于我</a></li>
      <li class="menu-item menu-item-search">
        <a role="button" class="popup-trigger"><i class="fa fa-search fa-fw"></i>搜索
        </a>
      </li>
  </ul>
</nav>



  <div class="search-pop-overlay">
    <div class="popup search-popup"><div class="search-header">
  <span class="search-icon">
    <i class="fa fa-search"></i>
  </span>
  <div class="search-input-container">
    <input autocomplete="off" autocapitalize="off" maxlength="80"
           placeholder="搜索..." spellcheck="false"
           type="search" class="search-input">
  </div>
  <span class="popup-btn-close" role="button">
    <i class="fa fa-times-circle"></i>
  </span>
</div>
<div class="search-result-container no-result">
  <div class="search-result-icon">
    <i class="fa fa-spinner fa-pulse fa-5x"></i>
  </div>
</div>

    </div>
  </div>

</header>
        
  
  <aside class="sidebar">

    <div class="sidebar-inner sidebar-nav-active sidebar-toc-active">
      <ul class="sidebar-nav">
        <li class="sidebar-nav-toc">
          文章目录
        </li>
        <li class="sidebar-nav-overview">
          站点概览
        </li>
      </ul>

      <div class="sidebar-panel-container">
        <!--noindex-->
        <div class="post-toc-wrap sidebar-panel">
            <div class="post-toc animated"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#%E4%B8%80%E3%80%81CISC%E5%92%8CRISC"><span class="nav-text">一、CISC和RISC</span></a></li><li class="nav-item nav-level-1"><a class="nav-link" href="#%E4%BA%8C%E3%80%81%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E5%AD%A6%E4%B9%A0%E6%B1%87%E7%BC%96%EF%BC%9F"><span class="nav-text">二、为什么要学习汇编？</span></a></li><li class="nav-item nav-level-1"><a class="nav-link" href="#%E4%B8%89%E3%80%81-GNU-%E6%B1%87%E7%BC%96%E8%AF%AD%E6%B3%95"><span class="nav-text">三、 GNU 汇编语法</span></a><ol class="nav-child"><li class="nav-item nav-level-2"><a class="nav-link" href="#1-%E4%BC%AA%E6%8C%87%E4%BB%A4%E5%92%8C%E4%BC%AA%E6%93%8D%E4%BD%9C"><span class="nav-text">1. 伪指令和伪操作</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#1-1-%E4%BC%AA%E6%8C%87%E4%BB%A4"><span class="nav-text">1.1 伪指令</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#1-2-%E4%BC%AA%E6%93%8D%E4%BD%9C"><span class="nav-text">1.2 伪操作</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#2-%E6%B1%87%E7%BC%96%E8%AF%AD%E6%B3%95%E6%A0%BC%E5%BC%8F"><span class="nav-text">2. 汇编语法格式</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#3-%E9%A2%84%E5%AE%9A%E4%B9%89%E6%AE%B5"><span class="nav-text">3. 预定义段</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#4-%E6%B1%87%E7%BC%96%E7%9A%84%E5%BC%80%E5%A7%8B%E4%B8%8E%E7%BB%93%E6%9D%9F"><span class="nav-text">4. 汇编的开始与结束</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#5-GNU-%E5%87%BD%E6%95%B0%E8%AF%AD%E6%B3%95"><span class="nav-text">5. GNU 函数语法</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#5-1-%E5%87%BD%E6%95%B0%E8%AF%AD%E6%B3%95"><span class="nav-text">5.1 函数语法</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#5-2-%E4%BD%BF%E7%94%A8%E5%AE%9E%E4%BE%8B"><span class="nav-text">5.2 使用实例</span></a></li></ol></li></ol></li><li class="nav-item nav-level-1"><a class="nav-link" href="#%E5%9B%9B%E3%80%81%E6%B1%87%E7%BC%96%E4%B8%8E%E6%9C%BA%E5%99%A8%E7%A0%81"><span class="nav-text">四、汇编与机器码</span></a><ol class="nav-child"><li class="nav-item nav-level-2"><a class="nav-link" href="#1-%E4%BB%8E%E4%B8%80%E4%B8%AA%E4%BE%8B%E5%AD%90%E5%BC%80%E5%A7%8B"><span class="nav-text">1. 从一个例子开始</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#2-%E6%8C%87%E4%BB%A4%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F"><span class="nav-text">2. 指令是什么？</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#3-%E6%B1%87%E7%BC%96%E7%9A%84%E6%89%A7%E8%A1%8C"><span class="nav-text">3. 汇编的执行</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#3-1-MOV%E6%8C%87%E4%BB%A4"><span class="nav-text">3.1 MOV指令</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#3-2-BL%E6%8C%87%E4%BB%A4"><span class="nav-text">3.2 BL指令</span></a></li></ol></li></ol></li></ol></div>
        </div>
        <!--/noindex-->

        <div class="site-overview-wrap sidebar-panel">
          <div class="site-author animated" itemprop="author" itemscope itemtype="http://schema.org/Person">
    <img class="site-author-image" itemprop="image" alt="苏木"
      src="/images/avatar.jpg">
  <p class="site-author-name" itemprop="name">苏木</p>
  <div class="site-description" itemprop="description">莫道桑榆晚，为霞尚满天</div>
</div>
<div class="site-state-wrap animated">
  <nav class="site-state">
      <div class="site-state-item site-state-posts">
        <a href="/archives/">
          <span class="site-state-item-count">673</span>
          <span class="site-state-item-name">日志</span>
        </a>
      </div>
      <div class="site-state-item site-state-categories">
          <a href="/categories/">
        <span class="site-state-item-count">42</span>
        <span class="site-state-item-name">分类</span></a>
      </div>
      <div class="site-state-item site-state-tags">
        <span class="site-state-item-count">43</span>
        <span class="site-state-item-name">标签</span>
      </div>
  </nav>
</div>
  <div class="links-of-author animated">
      <span class="links-of-author-item">
        <a href="https://github.com/sumumm" title="GitHub → https:&#x2F;&#x2F;github.com&#x2F;sumumm" rel="noopener me" target="_blank"><i class="fab fa-github fa-fw"></i>GitHub</a>
      </span>
  </div>

        </div>
      </div>
    </div>

    
  </aside>


    </div>

    <div class="main-inner post posts-expand">


  


<div class="post-block">
  
  

  <article itemscope itemtype="http://schema.org/Article" class="post-content" lang="zh-CN">
    <link itemprop="mainEntityOfPage" href="https://sumumm.github.io/post/23c67878.html">

    <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
      <meta itemprop="image" content="/images/avatar.jpg">
      <meta itemprop="name" content="苏木">
    </span>

    <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
      <meta itemprop="name" content="苏木">
      <meta itemprop="description" content="莫道桑榆晚，为霞尚满天">
    </span>

    <span hidden itemprop="post" itemscope itemtype="http://schema.org/CreativeWork">
      <meta itemprop="name" content="LV01-04-ARM汇编-01-ARM汇编基础 | 苏木">
      <meta itemprop="description" content="">
    </span>
      <header class="post-header">
        <h1 class="post-title" itemprop="name headline">
          LV01-04-ARM汇编-01-ARM汇编基础
        </h1>

        <div class="post-meta-container">
          <div class="post-meta">
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-calendar"></i>
      </span>
      <span class="post-meta-item-text">发表于</span>

      <time title="创建时间：2023-09-08 19:25:40" itemprop="dateCreated datePublished" datetime="2023-09-08T19:25:40+08:00">2023-09-08</time>
    </span>
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-folder"></i>
      </span>
      <span class="post-meta-item-text">分类于</span>
        <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
          <a href="/categories/%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/" itemprop="url" rel="index"><span itemprop="name">嵌入式开发</span></a>
        </span>
          ，
        <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
          <a href="/categories/%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/" itemprop="url" rel="index"><span itemprop="name">02IMX6ULL平台</span></a>
        </span>
          ，
        <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
          <a href="/categories/%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/" itemprop="url" rel="index"><span itemprop="name">LV01-IMX6ULL平台</span></a>
        </span>
    </span>

  
    <span class="post-meta-break"></span>
    <span class="post-meta-item" title="本文字数">
      <span class="post-meta-item-icon">
        <i class="far fa-file-word"></i>
      </span>
      <span class="post-meta-item-text">本文字数：</span>
      <span>4.2k</span>
    </span>
    <span class="post-meta-item" title="阅读时长">
      <span class="post-meta-item-icon">
        <i class="far fa-clock"></i>
      </span>
      <span class="post-meta-item-text">阅读时长 &asymp;</span>
      <span>15 分钟</span>
    </span>
</div>

        </div>
      </header>

    
    
    
    <div class="post-body" itemprop="articleBody"><p>本文主要ARM汇编基础知识的相关笔记，若笔记中有错误或者不合适的地方，欢迎批评指正😃。</p>
<span id="more"></span>

<!-- Photo: https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/ -->

<details class="folding-tag" blue><summary> 点击查看使用工具及版本 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center" width=150px>Windows版本</td>        <td align="left">windows11</td>    </tr>    <tr>        <td align="center">Ubuntu版本</td>        <td align="left">Ubuntu16.04的64位版本</td>      </tr>    <tr>        <td align="center">VMware® Workstation 16 Pro</td>        <td align="left">16.2.3 build-19376536</td>      </tr>    <tr>        <td align="center">终端软件</td>        <td align="left">MobaXterm(Professional Edition v23.0 Build 5042 (license))</td>      </tr>    <tr>        <td align="center">Linux开发板</td>        <td align="left">正点原子 i.MX6ULL Linux 阿尔法开发板</td>      </tr>    <tr>        <td align="center">uboot</td>        <td align="left">NXP官方提供的uboot，NXP提供的版本为uboot-imx-rel_imx_4.1.15_2.1.0_ga(使用的uboot版本为U-Boot 2016.03)</td>      </tr>    <tr>        <td align="center">linux内核</td>        <td align="left">linux-4.15(NXP官方提供)</td>      </tr>    <tr>        <td align="center">Win32DiskImager</td>        <td align="left">Win32DiskImager v1.0</td>      </tr></table>
              </div>
            </details>

<details class="folding-tag" blue><summary> 点击查看本文参考资料 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center">分类</td>        <td align="center">网址</td>        <td align="center">说明</td>    </tr>    <tr>        <td align="center" rowspan="5">官方网站</td>        <td align="left"><a href="https://www.arm.com/" target="_blank">https://www.arm.com/</a></td>        <td align="left">ARM官方网站，在这里我们可以找到Cotex-Mx以及ARMVx的一些文档</td>    </tr>    <tr>        <td align="left"><a href="https://www.nxp.com.cn/" target="_blank">https://www.nxp.com.cn/ </a></td>        <td align="left">NXP官方网站</td>    </tr>    <tr>        <td align="left"><a href="https://www.nxpic.org.cn/" target="_blank">https://www.nxpic.org.cn/</a></td><td align="left">NXP 官方社区</td>    </tr>    <tr>        <td align="left"><a href="https://u-boot.readthedocs.io/en/latest/" target="_blank">https://u-boot.readthedocs.io/en/latest/</a></td><td align="left">u-boot官网</td>    </tr>    <tr>        <td align="left"><a href="https://www.kernel.org/" target="_blank">https://www.kernel.org/</a></td><td align="left">linux内核官网</td>    </tr></table>
              </div>
            </details>

<details class="folding-tag" blue><summary> 点击查看相关文件下载 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center">分类</td>        <td align="center">网址</td>        <td align="center">说明</td>    </tr>    <tr>        <td align="center" rowspan="4">NXP</td>        <td align="left"><a href="https://github.com/nxp-imx" target="_blank">https://github.com/nxp-imx</a></td>        <td align="left">NXP imx开发资源GitHub组织，里边会有u-boot和linux内核的仓库</td>    </tr>    <tr>        <td align="left"><a href="https://elixir.bootlin.com/linux/latest/source" target="_blank">https://elixir.bootlin.com/linux/latest/source</a></td>        <td align="left">在线阅读linux kernel源码</td>    </tr>    <tr>        <td align="left"><a href="https://github.com/nxp-imx/linux-imx/releases/tag/rel_imx_4.1.15_2.1.0_ga" target="_blank">nxp-imx/linux-imx/releases/tag/rel_imx_4.1.15_2.1.0_ga</a></td>        <td align="left">NXP linux内核仓库tags中的rel_imx_4.1.15_2.1.0_ga</td>    </tr>    <tr>        <td align="left"><a href="https://github.com/nxp-imx/uboot-imx/releases/tag/rel_imx_4.1.15_2.1.0_ga" target="_blank">nxp-imx/uboot-imx/releases/tag/rel_imx_4.1.15_2.1.0_ga</a></td>        <td align="left">NXP u-boot仓库tags中的rel_imx_4.1.15_2.1.0_ga</td>    </tr>    <tr>        <td align="center" rowspan="2">I.MX6ULL</td>        <td align="left"><a href="https://www.nxp.com.cn/docs/en/data-sheet/IMX6ULLIEC.pdf" target="_blank">i.MX 6ULL Applications Processors for Industrial Products</a></td>        <td align="left">I.MX6ULL 芯片手册（datasheet，可以在线查看）</td>    </tr>    <tr>        <td align="left"><a href="https://www.nxp.com.cn/webapp/Download?colCode=IMX6ULLRM&lang_cd=zh" target="_blank">i.MX 6ULL Applications ProcessorReference Manual</a></td>        <td align="left">I.MX6ULL 参考手册（下载后才能查看，需要登录NXP官网）</td>    </tr>    <tr>        <td align="center" rowspan="5">ARM</td>        <td align="left"><a href="https://developer.arm.com/documentation/ddi0464/latest" target="_blank">Cortex-A7 MPCore Technical Reference Manual</a></td>        <td align="left">Cortex-A7 MPCore技术参考手册</td>    </tr>    <tr>        <td align="left"><a href="https://developer.arm.com/documentation/ddi0406/cd/?lang=en" target="_blank">ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition</a></td>        <td align="left">ARM架构参考手册ARMv7-A和ARMv7-R版</td>    </tr>    <tr>        <td align="left"><a href="https://developer.arm.com/documentation/ihi0069/h/?lang=en" target="_blank">Arm Generic Interrupt Controller Architecture Specification- version 3 and version 4</a></td>        <td align="left">Arm通用中断控制器架构规范-版本3和版本4</td>    </tr>    <tr>        <td align="left"><a href="https://developer.arm.com/documentation/ihi0048/bb/?lang=en" target="_blank">ARM Generic Interrupt Controller Architecture Specification - Version 2.0</a></td>        <td align="left">Arm通用中断控制器架构规范-版本2.0</td>    </tr>    <tr>        <td align="left"><a href="https://developer.arm.com/documentation/den0013/d/?lang=en" target="_blank">ARM Cortex-A Series Programmer's Guide for ARMv7-A</a></td>        <td align="left">Cortex-A系列ARMv7-A编程指南</td>    </tr></table>
              </div>
            </details>

<p>汇编相关可以参考《ARM® Architecture Reference Manual ARMv7-A and ARMv7-R edition  》的Chapter A5 ARM Instruction Set Encoding  部分。</p>
<h1 id="一、CISC和RISC"><a href="#一、CISC和RISC" class="headerlink" title="一、CISC和RISC"></a><font size=3>一、CISC和RISC</font></h1><p>根据指令复杂度来区分，所有 CPU 可以分为 2 类：  </p>
<ul>
<li>CISC 复杂指令集计算机， Complex Instruction Set Computer，比如x86</li>
<li>RISC 精简指令集计算机， Reduced Instruction Set Computing，比如ARM， RISC-V</li>
</ul>
<p>比如，对于加法运算： a &#x3D; a + b，它涉及 4 个步骤的操作：读出 a，读出b，计算 a+b，把结果写回 a。</p>
<p>（1）使用 CISC(复杂指令集计算机，比如 x86)提供的加法指令：只需要一条指令即可完成这 4 步操作。当然，这一个指令需要多个 CPU 周期才可以完成。<br>（2）而 RISC 不提供“一站式”的加法指令：需调用四条指令完成两数相加：内存 a 加载到寄存器，内存 b 加载到寄存器，两个寄存器中数相加，寄存器结果存入内存 a。</p>
<p>ARM 芯片属于精简指令集计算机(RISC： Reduced Instruction SetComputing)，它所用的指令比较简单，有如下特点：</p>
<p>（1）对内存只有读、写指令。</p>
<p>（2）对于数据的运算是在 CPU 内部实现。</p>
<p>（3）使用 RISC 指令的 CPU 复杂度小一点，易于设计  。</p>
<h1 id="二、为什么要学习汇编？"><a href="#二、为什么要学习汇编？" class="headerlink" title="二、为什么要学习汇编？"></a><font size=3>二、为什么要学习汇编？</font></h1><blockquote>
<p>为什么要学ARM汇编？</p>
</blockquote>
<p>我们在学习 STM32的时候几乎没有用到过汇编，但是我们在进行嵌入式  Linux  开发的时候是绝对要掌握基本的  ARM  汇编，对于 Cortex-A 芯片来讲，大部分芯片在上电以后  C 语言环境还没准备好，所以第一行程序肯定是汇编的，至于要写多少汇编程序，那就看我们能在哪一步把  C 语言环境准备好。</p>
<p>所谓的  C  语言环境就是保证  C  语言能够正常运行。  C 语言中的函数调用涉及到出栈入栈，出栈入栈就要对堆栈进行操作，所谓的堆栈其实就是一段内存，这段内存比较特殊，由  SP  指针访问，  SP  指针指向栈顶。芯片一上电  SP  指针还没有初始化，所以  C  语言没法运行，对于有些芯片还需要初始化  DDR ，因为芯片本身没有  RAM ，或者内部  RAM 不开放给用户使用，用户代码需要在 DDR 中运行，因此一开始要用汇编来初始化  DDR 控制器。后面学习  Uboot 和  Linux  内核的时候汇编是必须要会的。</p>
<blockquote>
<p>官方文档？</p>
</blockquote>
<p>我们在 ARM 的官网上可以找到很多的芯片手册以及编程指南，关于这篇笔记中的 ARM 指令，我们可以参考这篇文档：《<a target="_blank" rel="noopener" href="https://developer.arm.com/documentation/ddi0406/cd/?lang=en">ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition</a>》的 A4 章节，我们可以在这一章节系统的了解到 Cotex-A7 的所有汇编指令。我使用的开发板使用的 Cotex-A 系列的 ARM 处理器，所以这份文档就可以了。</p>
<h1 id="三、-GNU-汇编语法"><a href="#三、-GNU-汇编语法" class="headerlink" title="三、 GNU 汇编语法"></a><font size=3>三、 GNU 汇编语法</font></h1><h2 id="1-伪指令和伪操作"><a href="#1-伪指令和伪操作" class="headerlink" title="1. 伪指令和伪操作"></a><font size=3>1. 伪指令和伪操作</font></h2><h3 id="1-1-伪指令"><a href="#1-1-伪指令" class="headerlink" title="1.1 伪指令"></a><font size=3>1.1 伪指令</font></h3><p>伪指令( Pseudo Instruction )是用于<strong>对汇编过程进行控制的指令</strong>，该类指令并<strong>不是可执行指令</strong>，<strong>没有机器代码</strong>，只用于汇编过程中为汇编程序提供汇编信息。例如，提供如下信息：哪些是指令、哪些是数据及数据的字长、程序的起始地址和结束地址等。伪指令有 2 个特点：</p>
<p>（1）由于是伪“指令”，因而它只存在于汇编语言中。高级语言中不叫指令，叫语句；</p>
<p>（2）由于是“伪”指令，也即“假”指令，因而不是可执行指令，不会产生机器代码，不会占用 ROM 空间，只用于汇编过程中为汇编程序提供汇编信息。</p>
<h3 id="1-2-伪操作"><a href="#1-2-伪操作" class="headerlink" title="1.2 伪操作"></a><font size=3>1.2 伪操作</font></h3><p>汇编语言程序语句除指令以外还可以由伪操作和宏指令组成。伪操作不像机器指令那样是在程序运行期间由 CPU 来执行的，它是在汇编程序对源程序汇编期间由汇编程序处理的操作，它们可以完成如数据定义、分配存储区、指示程序结束等功能。</p>
<h2 id="2-汇编语法格式"><a href="#2-汇编语法格式" class="headerlink" title="2. 汇编语法格式"></a><font size=3>2. 汇编语法格式</font></h2><p> GNU 汇编语法适用于所有的架构，并不是  ARM  独享的，  GNU 汇编由一系列的语句组成，每行一条语句，每条语句有三个可选部分：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">label: instruction @ comment</span><br></pre></td></tr></table></figure>

<p><strong>【语句说明】</strong></p>
<ul>
<li><p>label ：标号，表示地址位置，有些指令前面可能会有标号，这样就可以通过这个标号得到指令的地址，标号也可以用来表示数据地址。注意 label后面的 : ，任何以 : 结尾的标识符都会被识别为 一个标号。</p>
</li>
<li><p>instruction ：指令，也就是汇编指令或伪指令。</p>
</li>
<li><p>@ ：表示后面的是注释，就跟  C 语言里面的 “  &#x2F;*   “和 ”  *&#x2F;  “ 一样，其实在  GNU 汇编文件中我们也可以使用” &#x2F;* “和”  *&#x2F; “来注释。</p>
</li>
<li><p>comment ：就是注释的内容了。</p>
</li>
</ul>
<p><strong>【注意】</strong></p>
<p>（1） ARM 中的指令、伪指令、伪操作、寄存器名等可以全部使用大写，也可以全部使用小写，但是不能大小写混用。</p>
<p>（2）汇编指令每行结束不需要带 ; 或者其他任何符号。</p>
<h2 id="3-预定义段"><a href="#3-预定义段" class="headerlink" title="3. 预定义段"></a><font size=3>3. 预定义段</font></h2><p>我们可以使用以下伪操作来定义一个段：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">.section .UserSection @定义一个 UserSection段</span><br></pre></td></tr></table></figure>

<p>在汇编系统中预定义了一些段名：</p>
<table>
    <tr><td align="left" width=150px>.text   </td><td align="left">表示代码段。</td></tr>
    <tr><td align="left" width=150px>.data   </td><td align="left">初始化的数据段。</td></tr>
    <tr><td align="left" width=150px>.bss    </td><td align="left">未初始化的数据段。</td></tr>
    <tr><td align="left" width=150px>.rodata </td><td align="left">只读数据段。</td></tr>
</table>

<h2 id="4-汇编的开始与结束"><a href="#4-汇编的开始与结束" class="headerlink" title="4. 汇编的开始与结束"></a><font size=3>4. 汇编的开始与结束</font></h2><p>汇编程序的默认入口标号是  _start ，不过我们也可以在链接脚本中使用  ENTRY 来指明其它的入口点，一般还是使用  _start 作为入口标号，下边就是一个完整的 GNU 汇编程序开始与结束的格式：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">.text				@ 表示当前段为代码段 </span><br><span class="line">.global _start		@ 声明_start为全局符号</span><br><span class="line">_start:				@ 汇编程序的入口</span><br><span class="line"></span><br><span class="line">	@ 中间这里是我们要写的指令</span><br><span class="line">	</span><br><span class="line">STOP:				@ 死循环，防止程序跑飞</span><br><span class="line">	B STOP</span><br><span class="line">	</span><br><span class="line">.end				@ 汇编程序的结束</span><br></pre></td></tr></table></figure>

<h2 id="5-GNU-函数语法"><a href="#5-GNU-函数语法" class="headerlink" title="5. GNU 函数语法"></a><font size=3>5. GNU 函数语法</font></h2><h3 id="5-1-函数语法"><a href="#5-1-函数语法" class="headerlink" title="5.1 函数语法"></a><font size=3>5.1 函数语法</font></h3><p>在汇编中同时也支持函数的定义使用，一般定义格式如下：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">函数名 : </span><br><span class="line">	函数体</span><br><span class="line">	返回语句</span><br></pre></td></tr></table></figure>

<p><strong>【注意】</strong> GNU 汇编函数返回语句不是必须的。</p>
<h3 id="5-2-使用实例"><a href="#5-2-使用实例" class="headerlink" title="5.2 使用实例"></a><font size=3>5.2 使用实例</font></h3><details class="folding-tag" blue><summary> 点击查看实例 </summary>
              <div class='content'>
              <figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">/* 未定义中断 */ </span><br><span class="line">Undefined_Handler:                 @ 函数名</span><br><span class="line">	LDR R0, = Undefined_Handler    @ 函数体</span><br><span class="line">	BX R0                          @ 返回语句，并非必须</span><br></pre></td></tr></table></figure>
              </div>
            </details>

<h1 id="四、汇编与机器码"><a href="#四、汇编与机器码" class="headerlink" title="四、汇编与机器码"></a><font size=3>四、汇编与机器码</font></h1><h2 id="1-从一个例子开始"><a href="#1-从一个例子开始" class="headerlink" title="1. 从一个例子开始"></a><font size=3>1. 从一个例子开始</font></h2><p>前面我们有这么一张图：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230719203508088.png" alt="image-20230719203508088" style="zoom:50%;" />

<p>数值 a 原来是保存在内存里的，执行了某条指令后，它的值被读入内存，那问题来了：  </p>
<ul>
<li>（1）什么指令，可以让 CPU 从内存里把数据读进来？</li>
</ul>
<p>例如：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">mov r3, #addr_a   @把变量 a 的地址传给 CPU 寄存器 r3</span><br><span class="line">ldr r0, [r3]      @从 r3 所指的内存把数值读进 CPU 寄存器 r0</span><br></pre></td></tr></table></figure>

<ul>
<li>（2）读进来后，这个数保存在哪里？</li>
</ul>
<p>保存在 CPU 内部，存在某个寄存器里，上面的代码用寄存器 r0 来保存该值。</p>
<ul>
<li>（3）如何处理数据？</li>
</ul>
<p>CPU 执行加法指令，比如：  </p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">add r0, r0, r1  @在 CPU 内部， r0=r0+r1</span><br></pre></td></tr></table></figure>

<ul>
<li>（4）最终数据怎么写入内存？</li>
</ul>
<p>CPU 执行指令，比如  ：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">str r0, [r3]  @将 r0 的值写入 r3 所指的内存</span><br></pre></td></tr></table></figure>

<h2 id="2-指令是什么？"><a href="#2-指令是什么？" class="headerlink" title="2. 指令是什么？"></a><font size=3>2. 指令是什么？</font></h2><p>上面例子中， mov、 add、 ldr、 str 等都是汇编指令，或者说它们是“助记符”──也就是帮助我们记忆的。这些指令其实是一个一个数值，我们去记这些数值有难度，所以就用 mov、 add 表示不同指令对应的数值。在下面的表格中， op1 对应bit[27:25]，不同的 op1 对应不同的指令。我们就用 mov、 add等等来表示这些值。    </p>
<p>需要注意的是， op1 只是指令，它只占据 3 位(bit[27:25])，一条完整的指令还需要更多参数。比如“ mov r1, r0”里面的 r1、 r0 就是参数。这些参数也是保存在同一个 32 位数里。这个 32 位数值就是机器码，即<strong>汇编指令</strong>是<strong>机器码的助记符</strong>。 ARM 指令机器码是有一定格式（对于<code>ARM</code>的<code>Cotex-A7</code>系列的指令编码格式可以看这篇文档《<a target="_blank" rel="noopener" href="https://developer.arm.com/documentation/ddi0406/cd/?lang=en">ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition</a>》的<code>A5</code>章节），如下：   </p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721190130743.png" alt="image-20230721190130743" style="zoom:50%;" />

<p>举个例子？我们后边编译完程序，可能会得到反汇编文件，里边将会包含机器码与汇编指令的对应关系，如：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721190407864.png" alt="image-20230721190407864" style="zoom:50%;" />

<h2 id="3-汇编的执行"><a href="#3-汇编的执行" class="headerlink" title="3. 汇编的执行"></a><font size=3>3. 汇编的执行</font></h2><p>这里举两个例子，一个是MOV，一个是BL。</p>
<h3 id="3-1-MOV指令"><a href="#3-1-MOV指令" class="headerlink" title="3.1 MOV指令"></a><font size=3>3.1 MOV指令</font></h3><p>我们以MOV指令为例，MOV 指令： Move register or constant，把某个寄存器的值移给另一个寄存器，或是把一个常数移入寄存器。  有如下汇编指令：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">mov r1, #10 @ 将 10 赋值给寄存器 r1，即 r1=10</span><br></pre></td></tr></table></figure>

<p>执行过程如下：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721192654760.png" alt="image-20230721192654760" style="zoom:50%;" />

<p>（1）取指： 假设从内存的 addrA 地址取机器码 e3a0100a（即 mov r1, #10 指令）</p>
<p>（2）译码： 原来是 MOV 指令</p>
<p>（3）执行： CPU 内部寄存器 R1 等于 10  </p>
<p>机器码 e3a0100a， MOV 指令各位的解析如下：  </p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721193017078.png" alt="image-20230721193017078" style="zoom:50%;" />

<p>[31:28]位是条件码 0xe； [15： 12]位是寄存器 R1，即 0x1； [12:0]位是立即数（前边学习另一个课程的时候起始学过了） 10， 即 0x00a  </p>
<h3 id="3-2-BL指令"><a href="#3-2-BL指令" class="headerlink" title="3.2 BL指令"></a><font size=3>3.2 BL指令</font></h3><p>BL 指令： Branch with Link，跳转并把返回地址记录在 LR 寄存器里。  例如</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">bl test_tag</span><br><span class="line">mov r1, #10</span><br><span class="line"></span><br><span class="line">test_tag:</span><br><span class="line">	mov r3, #0</span><br><span class="line">	mov pc, lr</span><br></pre></td></tr></table></figure>

<p>第 1 行，跳转到 test_tag 标签处执行“mov r3, #0”指令，并且将下一条指令即“mov r1, #10”指令的地址存储到 LR 寄存器。</p>
<p>第 6 行，返回到“ mov r1, #10”指令地址，并且执行“ mov r1, #10”指令指令执行过程，如下：  </p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/LV01-04-ARM%E6%B1%87%E7%BC%96-01-ARM%E6%B1%87%E7%BC%96%E5%9F%BA%E7%A1%80/img/image-20230721202213081.png" alt="image-20230721202213081" style="zoom:50%;" />

<p>（1）CPU 从内存的 addrA 地址取机器码 eb000000（即“bl test_tag”指令），执行后， PC 跳转到 test_tag 标签位置，即内存的 addrA+8 地址，从上图可知，其实 test_tag 标签的地址是“mov r3, #0”指令的地址。同时自动将内存的 addrA+4 地址存储在寄存器 LR 中。</p>
<p>（2）CPU 从内存的 addrA+8 地址取机器码 e3a03000（即“mov r3, #0”指令），执行， CPU 内部寄存器 R3 等于 0。</p>
<p>（3）CPU 从内存的 addrA+12 地址取机器码 e1a0f00e（即“mov pc, lr”指令），执行， PC 跳转到内存的 addrA+4 地址。</p>
<p>（4）CPU 从内存的 addrA+4 地址取机器码 e3a0100a（即“mov r1, #10”指令），执行， CPU 内部寄存器 R1 等于 10其中，机器码 eb000000， BL 指令各位的解析可以查《<a target="_blank" rel="noopener" href="https://developer.arm.com/documentation/ddi0406/cd/?lang=en">ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition</a>》的<code>A5</code>章节。</p>

    </div>

    
    
    

    <footer class="post-footer">




    <div>
        
            <div style="text-align:center;color: #ccc;font-size:14px;">
            ----------本文结束
            <i class="fas fa-fan fa-spin" style="color: #FF1493; font-size: 1rem"></i>
            感谢您的阅读----------
            </div>
        
    </div>





  
  <div class="my_post_copyright"> 
    <p><span>文章标题:</span><a href="/post/23c67878.html">LV01-04-ARM汇编-01-ARM汇编基础</a></p>
    <p><span>文章作者:</span><a href="/" title="欢迎访问 《苏木》 的学习笔记">苏木</a></p>
    <p><span>发布时间:</span>2023年09月08日 - 19:25</p>
    <p><span>最后更新:</span>2025年06月14日 - 00:25</p>
    <p><span>原始链接:</span><a href="/post/23c67878.html" title="LV01-04-ARM汇编-01-ARM汇编基础">https://sumumm.github.io/post/23c67878.html</a></p>
    <p><span>许可协议:</span><i class="fab fa-creative-commons"></i> <a rel="license" href= "https://creativecommons.org/licenses/by-nc-nd/4.0/" target="_blank" title="Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)">署名-非商业性使用-禁止演绎 4.0 国际</a> 转载请保留原文链接及作者。</p>  
  </div>
  


          <div class="post-tags">
              <a href="/tags/ALPHA-LV01-IMX6ULL%E5%B9%B3%E5%8F%B0/" rel="tag"><i class="fa fa-tag"></i> (ALPHA)LV01-IMX6ULL平台</a>
          </div>

        

          <div class="post-nav">
            <div class="post-nav-item">
                <a href="/post/5da13c2f.html" rel="prev" title="LV01-04-ARM汇编-02-ARM汇编指令">
                  <i class="fa fa-angle-left"></i> LV01-04-ARM汇编-02-ARM汇编指令
                </a>
            </div>
            <div class="post-nav-item">
                <a href="/post/ae3b678f.html" rel="next" title="LV01-03-Cortex-A7架构-04-三级流水线">
                  LV01-03-Cortex-A7架构-04-三级流水线 <i class="fa fa-angle-right"></i>
                </a>
            </div>
          </div>
    </footer>
  </article>
</div>






</div>
  </main>

  <footer class="footer">
    <div class="footer-inner">

  <div class="copyright">
    &copy; 2017 – 
    <span itemprop="copyrightYear">2025</span>
    <span class="with-love">
      <i class="fa fa-heart"></i>
    </span>
    <span class="author" itemprop="copyrightHolder">苏木</span>
  </div>
<div class="wordcount">
  <span class="post-meta-item">
    <span class="post-meta-item-icon">
      <i class="fa fa-chart-line"></i>
    </span>
      <span>站点总字数：</span>
    <span title="站点总字数">3.7m</span>
  </span>
  <span class="post-meta-item">
    <span class="post-meta-item-icon">
      <i class="fa fa-coffee"></i>
    </span>
      <span>站点阅读时长 &asymp;</span>
    <span title="站点阅读时长">225:26</span>
  </span>
</div>




    <span id="sitetime"></span>
    <script defer language=javascript>
        function siteTime()
        {
            window.setTimeout("siteTime()", 1000);
            var seconds = 1000;
            var minutes = seconds * 60;
            var hours = minutes * 60;
            var days = hours * 24;
            var years = days * 365;
            var today = new Date();
            var todayYear = today.getFullYear();
            var todayMonth = today.getMonth()+1;
            var todayDate = today.getDate();
            var todayHour = today.getHours();
            var todayMinute = today.getMinutes();
            var todaySecond = today.getSeconds();
            /*==================================================
            Date.UTC() -- 返回date对象距世界标准时间(UTC)1970年1月1日午夜之间的毫秒数(时间戳)
            year        - 作为date对象的年份，为4位年份值
            month       - 0-11之间的整数，做为date对象的月份
            day         - 1-31之间的整数，做为date对象的天数
            hours       - 0(午夜24点)-23之间的整数，做为date对象的小时数
            minutes     - 0-59之间的整数，做为date对象的分钟数
            seconds     - 0-59之间的整数，做为date对象的秒数
            microseconds - 0-999之间的整数，做为date对象的毫秒数
            ==================================================*/
            var t1 = Date.UTC(2017, 
                              5, 
                              19, 
                              0, 
                              0, 
                              0); //北京时间
            var t2 = Date.UTC(todayYear,todayMonth,todayDate,todayHour,todayMinute,todaySecond);
            var diff = t2-t1;
            var diffYears = Math.floor(diff/years);
            var diffDays = Math.floor((diff/days)-diffYears*365);
            var diffHours = Math.floor((diff-(diffYears*365+diffDays)*days)/hours);
            var diffMinutes = Math.floor((diff-(diffYears*365+diffDays)*days-diffHours*hours)/minutes);
            var diffSeconds = Math.floor((diff-(diffYears*365+diffDays)*days-diffHours*hours-diffMinutes*minutes)/seconds);
            document.getElementById("sitetime").innerHTML="已在这里 "+diffYears+" 年 "+diffDays+" 天 "+diffHours+" 小时 "+diffMinutes+" 分钟 "+diffSeconds+" 秒";
        }
        siteTime();
    </script>



    </div>
  </footer>

  
  <div class="back-to-top" role="button" aria-label="返回顶部">
    <i class="fa fa-arrow-up fa-lg"></i>
    <span>0%</span>
  </div>
  <div class="reading-progress-bar"></div>

<noscript>
  <div class="noscript-warning">Theme NexT works best with JavaScript enabled</div>
</noscript>


  
  <script src="https://cdnjs.cloudflare.com/ajax/libs/animejs/3.2.1/anime.min.js" integrity="sha256-XL2inqUJaslATFnHdJOi9GfQ60on8Wx1C2H8DYiN1xY=" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/next-theme-pjax/0.6.0/pjax.min.js" integrity="sha256-vxLn1tSKWD4dqbMRyv940UYw4sXgMtYcK6reefzZrao=" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/fancyapps-ui/5.0.28/fancybox/fancybox.umd.js" integrity="sha256-ytMJGN3toR+a84u7g7NuHm91VIR06Q41kMWDr2pq7Zo=" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/lozad.js/1.16.0/lozad.min.js" integrity="sha256-mOFREFhqmHeQbXpK2lp4nA3qooVgACfh88fpJftLBbc=" crossorigin="anonymous"></script>
<script src="/js/comments.js"></script><script src="/js/utils.js"></script><script src="/js/motion.js"></script><script src="/js/next-boot.js"></script><script src="/js/pjax.js"></script>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/hexo-generator-searchdb/1.4.1/search.js" integrity="sha256-1kfA5uHPf65M5cphT2dvymhkuyHPQp5A53EGZOnOLmc=" crossorigin="anonymous"></script>
<script src="/js/third-party/search/local-search.js"></script>




  <script src="/js/third-party/fancybox.js"></script>

  <script src="/js/third-party/pace.js"></script>


  




  

  <script class="next-config" data-name="enableMath" type="application/json">true</script><script class="next-config" data-name="mathjax" type="application/json">{"enable":true,"tags":"none","js":{"url":"https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js","integrity":"sha256-MASABpB4tYktI2Oitl4t+78w/lyA+D7b/s9GEP0JOGI="}}</script>
<script src="/js/third-party/math/mathjax.js"></script>


 
        <div id="click-show-text"
            data-mobile = false
            data-text = 富强,民主,文明,和谐,自由,平等,公正,法制,爱国,敬业,诚信,友善
            data-fontsize = 15px
            data-random= false>
        </div>
       

      
        <script async src=https://cdn.jsdelivr.net/npm/hexo-next-mouse-effect@latest/click/showText.js></script>
      

      
    




    <script async src="/js/fancybox_param.js"></script>





<!-- APlayer本体 -->



</body>
</html>
